Enable non-openwrt devices as hosts

[FFHener]

This is a first step into implementing #751. It currently only supports hosts that doesnt need airos_dfs_reset. The changes wont break the current way of defining everything. This way we can make a smooth transition.

Im not to shure what could be the best way to deal with locations that doesnt use an own mgmt-network.

Im not super experienced in writing jinja templates. Feel free to suggest better ways.

Merging this PR will enable us to move forward with #1012

[Noki]

We should have one or two example of devices that can run more than one OS e.g. the stock OS and OpenWRT or SwOS and RouterOS. How do we name model files in this case?

Ideas:

/group_vars/models/[os]/[name].yml
/group_vars/model_[os]_[name].yml

Currently I can't think of a good way of doing this without also touching all location files, but maybe we can also implement a fallback.

[FFHener]

If we choose the first option and set openwrt as default I think we could find a solution to not touch the current locations. I will have a look into it, but I'm not shure how to implement it in a simple way. We would need to add the os_flag to the hosts than instead.

[Noki]

For the snmp_devices we can and should continue to use snmp_profile and simply set it as "os" in order to be able to use it in the j2 template, because if we start changing something in the snmp_devices, we can also migrate everything at the same time, but that makes the PR extensive and therefore difficult to handle.

Suggestion:

bbb-configs/roles/cfg_openwrt/templates/common/collectd/conf.d/bbb-snmp.conf.j2

Line 4 in ba885ce

{# collect profiles from new way of writing hosts as well and append them #}

We insert a step here that runs through the profiles in a loop and ensures that os is set and filled with the value of snmp_profile so that the old notation is compatible. The changes to the locations are then optional.

Let me know if you have any questions regarding this proposal.

[spolack]

I think there are much better ways to archieve that. Lets have a workshop or chat on that.